Flex4 切换States实现3D旋转效果

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               minWidth="955"
               minHeight="600"
               backgroundColor="0x747474"
               creationComplete="application1_creationCompleteHandler(event)" viewSourceURL="srcview/index.html">
    <s:layout>
        <s:BasicLayout/>
    </s:layout>
    <s:states>
        <s:State name="s1"/>
        <s:State name="s2"/>
    </s:states>
    <s:transitions>
        <s:Transition fromState="*"
                      toState="s2">
            <s:Sequence target="{myGroup}">
                <s:Parallel>
                    <s:Fade target="{p2}"
                            alphaFrom="1"
                            alphaTo="0"
                            duration="600"/>
                    <s:Fade target="{p1}"
                            alphaFrom="0"
                            alphaTo="1"
                            duration="600"
                            effectEnd="fade1_effectEndHandler(event)"/>
                    <s:Rotate3D angleYFrom="0"
                                angleYTo="180"
                                duration="600"
                                repeatCount="1"
                                autoCenterTransform="true"/>
 
                </s:Parallel>
                <s:SetAction property="includeInLayout"/>
            </s:Sequence>
 
        </s:Transition>
 
        <s:Transition fromState="s2"
                      toState="*">
            <s:Sequence target="{myGroup}">
                <s:Parallel>
                    <s:Fade target="{p1}"
                            alphaFrom="1"
                            alphaTo="0"
                            duration="600"/>
                    <s:Fade target="{p2}"
                            alphaFrom="0"
                            alphaTo="1"
                            duration="600"
                            effectEnd="fade2_effectEndHandler(event)"/>
 
                    <s:Rotate3D angleYFrom="{angle}"
                                angleYTo="{angle+180}"
                                duration="600"
                                repeatCount="1"
                                autoCenterTransform="true"/>
 
                </s:Parallel>
                <s:SetAction property="includeInLayout"/>
            </s:Sequence>
        </s:Transition>
    </s:transitions>
 
    <fx:Script>
        <![CDATA[
            import mx.events.EffectEvent;
            import mx.events.FlexEvent;
            [Bindable]
            private var angle:Number=0;
            protected function button1_clickHandler(event:MouseEvent):void
            {
                switch (this.currentState)
                {
                    case "s1":
                    {
                        this.currentState='s2';
                        angle=0;
                        break;
                    }
                    case "s2":
                    {
                        this.currentState='s1';
                        angle=180;
                        break;
                    }
                }
 
            }
            protected function application1_creationCompleteHandler(event:FlexEvent):void
            {
                this.vidPlay2.source="assets/002.flv";
                this.vidPlay2.play();
            }
            protected function fade1_effectEndHandler(event:EffectEvent):void
            {
                this.vidPlay1.source="assets/001.flv";
                this.vidPlay1.play();
                this.vidPlay2.source=null;
            }
            protected function fade2_effectEndHandler(event:EffectEvent):void
            {
                this.vidPlay2.source="assets/002.flv";
                this.vidPlay2.play();
                this.vidPlay1.source=null;
            }
        ]]>
    </fx:Script>
    <s:Group id="myGroup"
             horizontalCenter="0"
             verticalCenter="0"
             width="400"
             height="400">
        <s:Group width="100%"
                 height="100%"
                 id="p1">
            <s:VideoPlayer id="vidPlay1"
                           left="0"
                           right="0"
                           top="0"
                           bottom="0"
                           autoPlay="false"
                           includeInLayout.s1="false"/>
        </s:Group>
        <s:Group width="100%"
                 height="100%"
                 id="p2">
            <s:VideoPlayer id="vidPlay2"
                           left="0"
                           right="0"
                           top="0"
                           bottom="0"
                           includeInLayout.s2="false"/>
        </s:Group>
    </s:Group>
    <s:Button label="Change State"
              click="button1_clickHandler(event)"
              horizontalCenter="0"
              verticalCenter="250"/>
 
</s:Application>